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Author |
Christofi, C.; Bruggeman, A.; Külls, C.; Constantinou, C. |
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Title |
Isotope hydrology and hydrogeochemical modeling of Troodos Fractured Aquifer, Cyprus: The development of hydrogeological descriptions of observed water types |
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Year |
2020 |
Publication |
Applied Geochemistry |
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Volume  |
123 |
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104780 |
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Keywords |
Isotope hydrology, Hydrogeochemical modelling, Hydrochemistry, Kargiotis, Troodos |
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Abstract |
The origin of groundwater recharge and subsequent flow paths are often difficult to establish in fractured, multi-lithological, and highly compartmentalized aquifers such as the Troodos Fractured Aquifer (TFA). As the conjunctive use of stable isotopes and hydrogeochemical data provides additional information, we established a monitoring network for stable isotopes in precipitation in Cyprus. The local meteoric water line, altitude effect and seasonal variation of stable isotopes in precipitation are derived from monitoring data. Stable isotopes and hydrogeochemical data are combined to model water-rock interactions and groundwater evolution along a complete ophiolite sequence. As a result a generic hydrogeologic description for the observed water types is developed. Isotope hydrology was applied in conjunction with hydrogeochemical modelling in Kargiotis Watershed, a major north-south transect of the TFA. PHREEQC was used for hydrogeochemical modelling to establish generic descriptions for observed water types. Mean precipitation-weighted values from 16 monitoring stations were used to calculate the Local Meteoric Water Line (LMWL), which was found to be equal to δ2H = (6.58 ± 0.13)*δ18O + (12.64 ± 0.91). A general decrease of 1.22‰ for δ2H and 0.20‰ for δ18O in precipitation was calculated per 100 m altitude. A generic groundwater evolution path was established: 1. Na/MgClHCO3, 2. MgHCO3, 3. Ca/MgHCO3, 4. Ca/MgNaHCO3, 4a. MgNa/CaHCO3/Cl, 5. NaMg/CaHCO3/Cl, 6. NaHCO3, 7. Na/MgHCO3SO4, 8. NaSO4Cl/HCO3. Hydrogeologic descriptions, consisting of groundwater origin, flow path and possible active water-rock processes, have been realised for the observed water types. The first two water types occur in serpentine and ultramafic-gabbro springs. Type 3 waters represent early stages of recharge and/or short flow paths, in gabbro whereas types 4 and 5 are typical for further percolating waters in gabbro and diabase. Water types 6 and 7 occur both in diabase and in the basal group and represent the regional flow. Water type 8 is the end member of regional, upwelling groundwater in the basal group. The presented descriptions and methods have practical applications in groundwater exploration, characterization, and protection. The methodology can be applied in other complex aquifer systems. |
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english |
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english |
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0883-2927 |
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Cyprus |
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THL @ christoph.kuells @ Christofi2020104780 |
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76 |
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Christofi, C.; Bruggeman, A.; Külls, C.; Constantinou, C. |
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Title |
Hydrochemical evolution of groundwater in gabbro of the Troodos Fractured Aquifer. A comprehensive approach |
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Journal Article |
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Year |
2020 |
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Applied Geochemistry |
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114 |
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104524 |
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geochemistry |
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Pergamon |
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English |
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THL @ christoph.kuells @ Christofi2020hydrochemical |
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13 |
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Zagana, E.; Külls, C.; Udluft, P. |
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Title |
Der Wasserhaushalt des Aliakmonas |
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2000 |
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Vom Wasser |
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94 |
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29-39 |
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THL @ christoph.kuells @ Zagana2000saa |
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34 |
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Hamutoko, J.; Mapani, B.; Ellmies, R.; Bittner, A.; Külls, C. |
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Title |
A fingerprinting method for the identification of uranium sources in alluvial aquifers: An example from the Khan and Swakop Rivers, Namibia |
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Journal Article |
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2014 |
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Physics and Chemistry of the Earth, Parts A/B/C |
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72 |
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34-42 |
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Pergamon |
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THL @ christoph.kuells @ Hamutoko2014fingerprinting |
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19 |
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Author |
Dávila, P.; Külls, C.; Weiler, M. |
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Title |
A toolkit for groundwater mean residence time interpretation with gaseous tracers |
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Journal Article |
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Year |
2013 |
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Computers & Geosciences |
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61 |
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116-125 |
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Pergamon |
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THL @ christoph.kuells @ Davila2013toolkit |
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22 |
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Author |
Dahan, O.; Tatarsky, B.; Enzel, Y.; Külls, C.; Seely, M.; Benito, G. |
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Title |
Dynamics of flood water infiltration and ground water recharge in hyperarid desert |
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Journal Article |
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2008 |
Publication |
Groundwater |
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46 |
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3 |
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450-461 |
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Blackwell Publishing Inc Malden, USA |
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THL @ christoph.kuells @ Dahan2008dynamics |
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27 |
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Klock, H.; Külls, C.; Udluft, P. |
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Title |
Estimation of relative recharge values for the northern Kalahari catchment, Namibia |
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2000 |
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Journal of African Earth Sciences |
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30 |
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4 |
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47-48 |
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THL @ christoph.kuells @ Klock2000estimation |
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33 |
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Benito, G.; Rohde, R.; Seely, M.; Külls, C.; Dahan, O.; Enzel, Y.; Todd, S.; Botero, B.; Morin, E.; Grodek, T. |
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Title |
Management of alluvial aquifers in two southern African ephemeral rivers: implications for IWRM |
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2010 |
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Water Resources Management |
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24 |
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4 |
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641-667 |
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Springer Netherlands |
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THL @ christoph.kuells @ Benito2010management |
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25 |
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Author |
Mahindawansha, A.; Külls, C.; Kraft, P.; Breuer, L. |
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Title |
Investigating unproductive water losses from irrigated agricultural crops in the humid tropics through analyses of stable isotopes of water |
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2020 |
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Hydrology and Earth System Sciences |
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24 |
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7 |
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3627-3642 |
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Copernicus GmbH |
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yes |
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THL @ christoph.kuells @ Mahindawansha2020investigating |
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14 |
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Author |
Zagana, E.; Külls, C.; Udluft, P.; Constantinou, C. |
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Title |
Methods of groundwater recharge estimation in eastern Mediterranean water balance model application in Greece, Cyprus and Jordan |
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2007 |
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Hydrological Processes: An International Journal |
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21 |
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18 |
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2405-2414 |
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John Wiley & Sons, Ltd. Chichester, UK |
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THL @ christoph.kuells @ Zagana2007methods |
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30 |
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